Maintenance Calories

I was reading and article which stated that if you ate at your maintenance calories it didn't matter what kind of food that you ate you couldn't gain weight. So I checked my maintenance calories on one of the websites and at 192 pounds my maintenance calories are 2770, So i then checked the calories in a frosted chocolate donut at Dunkin Donuts and it was 230 calories, I divided that by 2770 and basically i can eat 12 of theses donuts a day and not gain weight..I find this hard to believe,can this be true